Cutter-head.



Du); DIXON.

CUTTER HEAD.

ARPLICATION FILED MAR. 21. 1916.

1,225,1 99 Patented May 8, 191?.

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DAVID J. DIXON, OF TACOMA, WASHINGTON.

CUTTER-HEAD.

Specification of Letters Patent.

Patented May 3, 1217.

Application filed March 21, 1916. Serial No. 85,732.

To alt whom it may concern Be it known that 1, DAVID J. DIXON, a citizen of the United States, and a resident of Tacoma, in the county of Pierce and State of lVashington, have invented a new and useful Improvement in Cutter-ilezuls, of which the following is a specification.

This invention relates to improvements in cutter heads that are used on machines for making handles as broom handles and the like, and the object of this improvement is to provide a strong and simply constructed cutter head having knife holders that may be adjusted to adapt the machine to make handles of different sizes without changing the head.

The invention consists in the novel construction of a cutter head and the adaptation and combination of such cutter head with a handle making machine as will be more clearly described in the following specification, illustrated in the accompanying drawings and finally pointed out in the appended claims.

In the accompanying drawings Figure 1 is a view in side elevation of a well known type of handle turning machine upon which my cutter head-is installed; Fig. 2 is a detached view in elevation of a cutter head embodying this invention; Fig. 3 is an end view of the device shown in Fig. 2; Fig. t is a view in cross section on broken line a, at of Fig. 2 showing certain parts in elevation; Fig. 5 is a' view similar to Fig. 1 showing certain parts in a different operative position; Fig. 6 is a sectional view on broken line 6, 6 of Fig. 2; Fig. 7 is a sectional view on broken line 7 7 of Fig. 2; Fig. 8 is an enlarged sectional view on broken line 8, 8 of Fig. 1, and Fig. 9 is a fragmentary sectional view illustrating a removable bushing used in the cutter head.

Like reference numerals indicate like parts throughout the accompanying drawings; I

In Fig. 1 I have shown my cutter head as applied to a handle turning machine of a well known form of construction, parts of which will hereinafter be briefly described to make more clear the operation of the cutter head.

Referring to Fig. 1 the numeral 10 indicates a frame that is mounted upon legs 11 and provided at its forward end with a guide 12 upon which bars or blanks of wood from which handles are to be turned may rest. 13 are two scored feed rolls only one of which is shown, that are mounted side by side on the forward end of the frame to engage with and feed the blanks forward to the cutter head and lfi: and 15 are two pairs of grooved feed rolls that are similarly mounted on the rear end of the frame to engage with and remove the finished handle after it has passed through the cutter head.

The rolls 13 are each mounted on a vertical shaft 16, only one of which is shown, and the shafts 16 are geared together for simultaneous rotation thereof by gearwheels 17. One of the shafts 16 is further pro vided with a bevel gear 18 that meshes with a corresponding bevel gear 19 on a horizontal shaft 20 that is driven by a belt 21 which is connected with the main drive of the machine.

The rolls 14 are driven in the same manner as the rolls 13 and the rolls 15 are driven from the rolls 1% by a well known form of link belt connection 22.

23 is a driven shaft upon which is mounted a cam 24: that engages with a roller 25 on a lever arm 26. The lever arm 26 is secured to a rocker shaft 27 that is journaled in the frame 10 and provided with a fixedly mounted arm 28 that is pivotally connected by a link 29 with a transverse bar 30. The bar 30 is pivotally secured to the frame 10 at one point and is articulated at another point with a link 31, shown by dotted lines in Fig. 1, that is connected with a'movable bearing 32 in such manner that the bearing will be reciprocated at varying speeds by the rotation of the cam 2d.

All of the parts hereinbefore described are common to handle turning machines it being the cutter head and the means of mounting such cutter head on the frame that form the subject of this invention.

Referring to Figs. 2 to 9 inclusive the numeral 34 indicates a hollow shank an integrally formed disk 35 on one end thereof and is provided witha longitudinally movable bearing sleeve 36 that is splined thereon by means of a rib 37 and adapted to rotate within the boxing 32.

Spaced from the disk 35 and rigidly secured thereto by three bolts or pins 38, 39, and L0 is another disk or face plate i1 that is provided on its front side with a knife holder 42, see Fig. pivoted on the end of the bolt 40 and the other end of which is provided with a slotted that has i 3, one end of which is able bearing sleeve 36 and hole 43 and is secured to the plate 41 by a set screw 44 whereby it may be adjusted.

The knife holder 42 is provided with a thickened portion 42 to which a knife 45 may be secured by a set screw 46 the knife being slotted to admit of adjustment longitudinally of the knife holder.

The rear side of the plate 41 is provided with another knife holder 47 one end of which is pivoted on the pin 38 and the other end of which terminates in an arm 48 that projects through a slotted guide lug 50 and through an angularly disposed slot 51 in a plate 52 that rigidly secured to the movslidably mounted in the plates and 41 whereby when the bearing sleeve 36 is moved lengthwise of the cutter head the plate will be moved as indicated in Fig. 7 and the knife holder will be turned about the pivot 38 into various adjusted positions.

The knife holder 4? is provided with an enlarged portion 4? that carries a bit or knife 45 ofa form hereinbefore described and the central portion of such knife holder is curved to clear the cylindrical passageway 53 through which the handle passes.

The holder 53 in the plate 41 is preferably formed as shown in Fig. 9 and is adapted to receive a removable bushing 54 that may be of any desired size to fit the handle that is being turned.

55 is a guard member that is pivoted on the pin 38 and is held in adjusted position on the face of the disk 35 by a set screw 56, the guard member 55 being provided with a curved portion 57 that is disposed in a position diametrically opposite the finishing knife 45 to hold a handle from coming in contact with such knife when it leaves the bushing 54.

The bearing sleeve 36 is provided with an externally disposed annular rib 58 and is journaled for rotation in the two part boxing 32 that has laterally projecting tongues 59 which are slidably disposed in grooves in side plates 60 that are secured to the frame 10, see Fig. 8, the lower portion of the boxing 32 being connected with the end of the reciprocating link 31 whereby its movement relative to the cutter head will bear a definite relation to the position of a blank within the feed rolls.

The shank 34 is provided with a fixed boxing 61 having tongues, not shown, that fit within grooves 62 in the shank and prevent endwise movement thereof and such shank is also provided with two fixedly mounted belt pulleys 63 and 64, the pulley 63 being located between boxing 32 and boxing 61 and being engaged by a power driven belt 65 and the pulley 64 being disposed on the extreme rear end of the shank 34 and serving as a driving pulley for the belt 21.

v In operation the device is set up as shown in Fig. l and the cam 24 is suitably timed to make one complete revolution during the time that a handle is passing completely through the cutter head.

The blanks from which handles are made are usually square in cross section before the handles are turned and the first knife 45 is so set that it will rough off the corners and reduce the stick to approximately the largest diameter of the handle that is to be made.

The second knife is adapted to be moved from the position shown in Fig. 4 to the position shown in Fig.5 on each forward movement of the bar 52 and the cam 24 may be so formed that any desired shape of handle may be turned :For instance if the knives engage the butt of the handle when the cam is in the postion shown in Fig. 1 then the roller 25 will ride on the rounded surface of the cam and the arm 26 will be gradually raised through the greater part of one complete revolution of the cam thus causing the knife 45 to gradually'move from the position shown in Fig. 5 to the postion shown in Fig. 4 and to cut with gradually increasing depth from' the butt to the tip of the handle thus tapering the handle from the butt to the tip thereof. However when the roller 25 passes over the somewhat abrupt portion 24 of the cam the lever will be rather quickly lowered and the knife 45 again moved outwardly thus causing a nob to be formed on the tip end of the handle.

Obviously various shapes may be given to the handle by varying the shape of the cam 24.

The guard 55 is disposed in a position substantially diametrically opposite to the finishing knife 45 and may be so adjusted that it will lightly engage and steady the handle that is being turned.

What I claim and desire to secure by Letters Patent is 1. A hollow cutter head comprising a circular plate provided with a concentric bore, a knife holder having one end pivotally secured to the front side of said plate adjacent the periphery thereof and its other end adjustably secured to said plate opposite said pivot said knife holder having a knife secured thereto adjacent the pivot and being curved in its central portion to clear said concentric bore.

2. A hollow cutter head comprising a tubular shank, a disk provided on one end thereof and having a concentric bore, a circular plate rigidly secured to said disk adjacent thereto, an adjustable knife holder secured to the rear side of said circular plate and provided with a knife, and a guard member having one end pivoted to said disk and the other end adjustably secured to said disk, the central portion of said guard member being curved and adapted to be moved to overlap the concentric bore in said disk and said guard member being positioned diametrically opposite said knife.

3. A hollow cutter head comprising a shank, a circular plate having a concentric bore, supports rigid with said shank and fixedly secured to said circular plate at points removed from the center thereof to leave the inner central face of said plate clear, a knife holder having one end pivotally secured to the front side of said cir cular plate and the other end adjustably secured to said circular plate opposite said pivot, said knife holder having an arcuate central portion adapted to clear said con- Copies of this patent may be obtained for five cents each, by addressing the centric bore, a knife on said knife holder, another knife holder having an arm on one end and having its opposite end pivotally secured to the rear side of said circular plate, said last named knife holder having an arcuate center portion, a knife on said last named knife holder in diametrically opposite relation to said first named knife, and means for moving said arm on said last named knife holder to adjust the position thereof.

Signed by me at Tacoma, l/Vashington, this 4th day of February, 1916.

DAVID J. DIXON. lVitnesses:

HELEN CRoMWnLL, F. C. MATHENY.

Commissioner of Patents,

Washington, D. C. 

